The physics
Real physics, explained plainly. Each piece answers one question a nine-year-old might ask at the dinner table, in language a parent or a teacher can hand straight over, written by the author of The Measure.
- Why does pushing something send you the other way?On the ground you never notice, because the planet takes the other half. Take the ground away and the arithmetic arrives all at once.Interactive5 min readThere is a sport in the book played in a place with no floor and no down, where the whole skill is in what happens to you after you have done the thing you meant to do.
- What does a heavy thing actually do to the space around it?Not pulling, not radiating, not reaching out. Something quieter than that, which never entirely stops, anywhere in the universe.Interactive5 min readThere is a machine in the book that fills a dark room with cold points and lets you see the shape of it, and it is honest enough to admit that it is only a picture.
- What would you weigh inside a hollowed-out world?Not less and less until you are crushed. Less and less until there is nothing left to pull you at all — across a whole room, not just at one point.Interactive6 min readCairn is a world with its middle taken out and packed into its walls, and the people who live at the bottom of it are the ones nobody writes about.
- Is there really a down?Down feels like the most obvious direction there is — until you notice that it points somewhere different for everybody.5 min readIn The Measure, learning to stop trusting down is the first thing that makes Koby good at the sport.
- Why do a hammer and a feather fall at the same speed?Heavy things do not fall faster than light things. Air is the whole reason it looks like they do.5 min readIn The Measure, everyone on the pitch falls at exactly the same rate, and the game is about what you do with that fact.
- Do you actually move the Earth when you jump?You push the planet exactly as hard as it pushes you. The difference is what happens next.5 min readIn The Measure, that equal-and-opposite push is not a footnote — it is the whole sport.
- Why does distance matter so much to gravity?Move twice as far away and the pull does not halve — it drops to a quarter. That one detail decides how orbits, tides and falling all behave.5 min readIn The Measure, height is never just height — every metre you gain changes what the pull underneath you is worth.
- Why would you be weightless at the centre of the Earth?The middle of a planet sounds like the strongest place for gravity. It is actually the one place with none at all.4 min readIn The Measure, the pull is never a single fixed number — where you are standing decides what it is worth.
- Could Drop actually work?A sport played on ground that will not hold still, where every push you give is a push you get back. Most of it is real. One part is not.5 min readThe Measure takes the honest half of this seriously and never lets a player off the hook for the rest.
- What would a world with two suns actually look like?Almost every version you have seen gets it wrong in the same way. The real thing is stranger, and you can read the date off your own shadow.Interactive6 min readHarbour has two suns and nobody in the book ever remarks on it, because nobody remarks on their own sky.
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